’...provides a valuable new component to the theoretical analysis of intellectual property law... Breakey offers us a conceptual foundation (and terminology) for the articulation of freedoms that are useful beyond the confines of intellectual property.’ The Law and Politics Book Review ’Intellectual liberty is set to become a key reference point in the emerging field of the philosophy of intellectual property. Breakey argues that rather than offering justifications for strong regimes of intellectual property rights, natural rights theories point towards effective and sustainable users' rights. Intellectual property rights do not stand as trumps but as components in systems of rights and liberties, in particular intellectual liberties, such as the freedom to learn about the world and to use what one has learned to inform one's actions. These intellectual liberties frame and cabin the reach of justifiable intellectual properties. Breakey's argument is made with care, sophistication, clarity, and verve.’ Lionel Bently, University of Cambridge, UK